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Hearing/equilibrium

QuestionAnswer
What is the bony labyrinth Set of tube-like cavities in the temporal bone
What is the bony labyrinth filled with Perilymph
What is the membranous labyrinth Set of membranous tubes containing sensory receptors for hearing and balance
What is the membranous labyrinth filled with Endolymph
What is the Vestibular Apparatus function Equilibrium
What is the cochlea's function Auditory
How many semi-circular ducts/canals are there 3: Anterior, posterior, lateral
What consists of the semi-circular canals Bony labyrinth
What consists of the semi-circular ducts Membranous labyrinth
What is the ampulla Dilated sac at the base of each duct
What does the ampulla open into Utricle
What is the Crista Ampularis Inside ampulla that contains hair cells
What are hair cells Sensory cells with supporting cells
How are hair cells activated in the Ampulla When endolymph fluid rushes over them due to head rotation
Where is the utricle Base of each semi-circular duct (posterior)
Where is the saccule Anterior to the utricle
What does the utricle and saccule contain Macula
What does the macula contain Contains hair cells inside a gelatinous otolithic membrane with otoliths
What does the macula do Detect stationary tilt of head
What are Otoliths Calcium carbonate crystal
How are the hair cells activated in the Macula Movement of endolymph produces movement of the gelationous layer against the hair cells
What are the three fluid filled chambers in the cochlea 1. Vestibular duct 2. Cochlear duct 3. Typanic Duct
What does the vestibular duct contain Perilymph
What does the Cochlear duct contain (2 things) Endolymph and Organ of Corti
What does the Tympaic duct contain Perilymph
What is the gelationous cover in the Organ or Corti Tectorial Membrane
What is the function of the Organ of Corti Converts mechanical energy from the bony tectorial membrane scraping against the hair cells into electrical energy
What is conductive hearing loss Impaired movement of sound waves or damage to one of the components
What is Sensorineural Hearing loss Defect in neural pathways
What is the Weber test Determines hearing loss in one or both ears
Where does sound localize in conductive hearing loss when doing the weber test The poor ear
Where does the sound localize in Sensorineural hearing loss The good ear
What is the Rinne test Determines a patients hearing ability conducted by air or bone
What would be considered conductive hearing loss when performing the Rinne test If the patient can still hear vibration on the bone after they can't hear it in the air
Inner and outter hair cells of organ of corti Hearing comes from inner hair cells -- outer ones adjust cochlear responses to different frequencies increasing precision
Cochlear tuning Tuning mechanisms (2) increase ability of cochlea to receive some frequencies better than others. Outer hair cells contract in response to motor stimuli reducing the basilar membranes freedom to vibrate
Created by: Destynelamar
 

 



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